There are 65 versions of rtkapo.dll in the wild, the latest version being 11.0.6000.64 built by: WinDDK. The average file size is about 2.7 MB. The file is a digitally signed and issued to Realtek Semiconductor Corp by VeriSign. Numerous variations of rtkapo.dll have been installed with both Realtek High Definition Audio Driver and Realtek AC'97 Audio.
(Note, the programs listed below are for all versions of Realtek(r) LFX/GFX DSP component.)
United States installs about 32.79% of Realtek(r) LFX/GFX DSP component.